Never had any problems with Sandisk, currently I use 1GB in the Acekard 2i and 2GB in the R4 SDHC. Most corruptions are not a problem of the card, as much as a problem of a bad card reader, particularly those crappy USB adapters that come with flashcarts. The only reason people recommend Kingstons is because they used to be the most compatible msd with the R4 flashcarts. Nowadays it doesn't matter so much.